+ Ryan died in February, 2019 and is survived by his wife, Mary, and their son, Scooter (who turned 18 in 2019). Mary is the executor of Ryan's estate and maintains the household in which she and Scooter live. All of their support is furnished by Mary. Scooter earned, approximately, $7,000 in 2019, 2020, and 2021. Scooter was considered a college student in 2019 and 2020, but not in 2021. Finally, Mary has not remarried to date. Based on this information, what is Mary's most advantageous (and legal) Federal income tax filing status for 2020: Head of household Married filing jointly Married filing separately Single Qualifying widow(er) BI U ab